KENNEDY SPACE CENTER, FLA. -In the Space Station Processing Facility at NASA?s Kennedy Space Center, the P3/P4 Truss is rotated to the upper deck position in preparation for installation of the upper deck solar array wing. The truss is scheduled to launch on mission 12A, STS-115, to the International Space Station. The wing was removed to replace aging flight batteries. New batteries are being installed to ensure that the batteries do not exceed their lifetime expectancy prior to their planned logistics resupply on-orbit. The new batteries have a lifetime expectancy of approximately 7 years.